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#21
Did you follow all of the steps in Overcoming Windows 7 Installation Failures - Windows 7 Help Forums?
This will assure a perfect install which should have no such issues. Then set it up as provided in these same steps for Clean Reinstall - Factory OEM Windows 7.
Be sure to pay attention to how drivers are handled in Win7. If you use only the tools and methods provided then you will get and keep a perfect install for as long as you do.